353331 ÷ 91 
The aim is to understand the frequency of 91 in 353331.

Moving on to step 1:
3 divided by 91 is 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Grab the next digit (5) from the dividend, add it to 3, then carry on: 35 / 91

Moving on to step 2:
When dividing 35 by 91, we get 0 with a remainder of 35.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 35 after subtracting 0 from 35.
Take the next digit (3) from the dividend and append it to 35, then repeat: 353 / 91

Moving on to step 3:
The number 91 fits into 353 3 times, leaving a remainder of 80.
Write down 3 as next digit of the result. 
Result so far: 3.0
The remainder is 80 after subtracting 273 from 353.
Include the next digit (3) from the dividend after 80, then repeat: 803 / 91

On to step 4:
When dividing 803 by 91, we get 8 with a remainder of 75.
The next digit of our result is 8. 
Result so far: 38.0
Subtracting 728 from 803 leaves us with 75.
Append the next digit (3) from the dividend to 75 and continue with: 753 / 91

Moving on to step 5:
If we divide 753 by 91, we get 8 and a remainder of 25.
Write down 8 as next digit of the result. 
Result so far: 388.0
Deduct 728 from 753 and we're left with 25.
Bring next digit (1) of the dividend behind the 25 and repeat the process: 251 / 91

Advancing to step 6:
The number 91 fits into 251 2 times, leaving a remainder of 69.
Put 2 as the next digit of the answer. 
Result so far: 3882.0
Deduct 182 from 251 and we're left with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Going ahead to step 7:
When dividing 690 by 91, we get 7 with a remainder of 53.
Use 7 as the next digit of our solution. 
Result so far: 3882.7
Deduct 637 from 690 and we're left with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Step 8:
If we divide 530 by 91, we get 5 and a remainder of 75.
The next digit of our result is 5. 
Result so far: 3882.75
The remainder is 75 after subtracting 455 from 530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

On to step 9:
750 divided by 91 is 8 with a remainder of 22.
Record the quotient 8 as the next digit in the result. 
Result so far: 3882.758
Subtract 728 from 750 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 10:
91 goes into 220 2 times with a remainder of 38.
Use 2 as the next digit of our solution. 
Result so far: 3882.7582
If we take 182 away from 220, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 11:
The number 91 fits into 380 4 times, leaving a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 3882.75824
Subtract 364 from 380 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 12:
91 can be fit into 160 1 times, resulting in a remainder of 69.
The next digit of our result is 1. 
Result so far: 3882.758241
If we subtract 91 from 160, we get 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Going ahead to step 13:
If we divide 690 by 91, we get 7 and a remainder of 53.
Write down 7 as next digit of the result. 
Result so far: 3882.7582417
If we subtract 637 from 690, we get 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Moving on to step 14:
530 divided by 91 is 5 with a remainder of 75.
Write down 5 as next digit of the result. 
Result so far: 3882.75824175
The remainder is 75 after subtracting 455 from 530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

The quotient of the division is 3882.75824175, and the remainder is 7.5e-08.